if that's the case
if that's the case... ...
you can re-apply next year, there's no age limit to tertiary education
as long as you meet the grade.
if it's because of your results not good enough to gain entry to the course,
my advice is re-do your O levels, make sure you get good grades and apply for the course again next year. One year to change your life but make sure you get better results at least improvement in 2 folds.
this is a crude way but if you insist to get to the course, one year of sacrifice
may change your whole life.